Linux-parisc archive on lore.kernel.org
 help / color / Atom feed
From: Ira Weiny <ira.weiny@intel.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@lst.de>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
	Helge Deller <deller@gmx.de>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	"David S. Miller" <davem@davemloft.net>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Chris Zankel <chris@zankel.net>,
	Max Filippov <jcmvbkbc@gmail.com>,
	Dan Williams <dan.j.williams@intel.com>,
	linux-snps-arc@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org,
	linux-xtensa@linux-xtensa.org, dri-devel@lists.freedesktop.org,
	Christian Koenig <christian.koenig@amd.com>,
	Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH V3 10/15] arch/kmap: Define kmap_atomic_prot() for all arch's
Date: Mon, 18 May 2020 11:17:05 -0700
Message-ID: <20200518181705.GD3025231@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <20200517173722.GA33341@roeck-us.net>

On Sun, May 17, 2020 at 10:37:22AM -0700, Guenter Roeck wrote:
> Hi,
> 
> On Thu, May 07, 2020 at 07:59:58AM -0700, ira.weiny@intel.com wrote:
> > From: Ira Weiny <ira.weiny@intel.com>
> > 
> > To support kmap_atomic_prot(), all architectures need to support
> > protections passed to their kmap_atomic_high() function.  Pass
> > protections into kmap_atomic_high() and change the name to
> > kmap_atomic_high_prot() to match.
> > 
> > Then define kmap_atomic_prot() as a core function which calls
> > kmap_atomic_high_prot() when needed.
> > 
> > Finally, redefine kmap_atomic() as a wrapper of kmap_atomic_prot() with
> > the default kmap_prot exported by the architectures.
> > 
> > Reviewed-by: Christoph Hellwig <hch@lst.de>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> 
> This patch causes a variety of crashes whem booting powerpc images in qemu.

PowerPC has the same issue as microblaze and sparc.

I'm preping a patch with all three fixed which fixes the kunmap_atomic clean up
patch...

Sorry for not seeing this last night...

Hopefully this can explain all the problems.  It is clearly a bug.

Ira

> 
> There are lots of warnings such as:
> 
> WARNING: CPU: 0 PID: 0 at lib/locking-selftest.c:743 irqsafe1_hard_spin_12+0x50/0xb0
> Modules linked in:
> CPU: 0 PID: 0 Comm: swapper Tainted: G        W         5.7.0-rc5-next-20200515 #1
> NIP:  c0660c7c LR: c0660c44 CTR: c0660c2c
> REGS: c1223e68 TRAP: 0700   Tainted: G        W          (5.7.0-rc5-next-20200515)
> MSR:  00021000 <CE,ME>  CR: 28000224  XER: 20000000
> 
> GPR00: c0669c78 c1223f20 c113d560 c0660c44 00000000 00000001 c1223ea8 00000001
> GPR08: 00000000 00000001 0000fffc ffffffff 88000222 00000000 00000000 00000000
> GPR16: 00000000 00000000 00000000 00000000 c0000000 00000000 00000000 c1125084
> GPR24: c1125084 c1230000 c1879538 fffffffc 00000001 00000000 c1011afc c1230000
> NIP [c0660c7c] irqsafe1_hard_spin_12+0x50/0xb0
> LR [c0660c44] irqsafe1_hard_spin_12+0x18/0xb0
> Call Trace:
> [c1223f20] [c1880000] megasas_mgmt_info+0xee4/0x1008 (unreliable)
> [c1223f40] [c0669c78] dotest+0x38/0x550
> [c1223f70] [c066aa4c] locking_selftest+0x8bc/0x1d54
> [c1223fa0] [c10e0bc8] start_kernel+0x3ec/0x510
> [c1223ff0] [c00003a0] set_ivor+0x118/0x154
> Instruction dump:
> 81420000 38e80001 3d4a0001 2c080000 91420000 90e20488 40820008 91020470
> 81290000 5529031e 7d290034 5529d97e <0f090000> 3fe0c11c 3bff3964 3bff00ac
> irq event stamp: 588
> hardirqs last  enabled at (587): [<c00b9fe4>] vprintk_emit+0x1b4/0x33c
> hardirqs last disabled at (588): [<c0660c44>] irqsafe1_hard_spin_12+0x18/0xb0
> softirqs last  enabled at (0): [<00000000>] 0x0
> softirqs last disabled at (0): [<00000000>] 0x0
> ---[ end trace b18fe9e172f99d03 ]---
> 
> This is followed by:
> 
> BUG: sleeping function called from invalid context at lib/mpi/mpi-pow.c:245
> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 14, name: cryptomgr_test
> INFO: lockdep is turned off.
> CPU: 0 PID: 14 Comm: cryptomgr_test Tainted: G        W         5.7.0-rc5-next-20200515 #1
> Call Trace:
> [ce221b58] [c008755c] ___might_sleep+0x280/0x2a8 (unreliable)
> [ce221b78] [c06bc524] mpi_powm+0x634/0xc50
> [ce221c38] [c05eafdc] rsa_dec+0x88/0x134
> [ce221c78] [c05f3b40] test_akcipher_one+0x678/0x804
> [ce221dc8] [c05f3d7c] alg_test_akcipher+0xb0/0x130
> [ce221df8] [c05ee674] alg_test.part.0+0xb4/0x458
> [ce221ed8] [c05ed2b0] cryptomgr_test+0x30/0x50
> [ce221ef8] [c007cd74] kthread+0x134/0x170
> [ce221f38] [c001433c] ret_from_kernel_thread+0x14/0x1c
> Kernel panic - not syncing: Aiee, killing interrupt handler!
> CPU: 0 PID: 14 Comm: cryptomgr_test Tainted: G        W         5.7.0-rc5-next-20200515 #1
> Call Trace:
> [ce221e08] [c00530fc] panic+0x148/0x34c (unreliable)
> [ce221e68] [c0056460] do_exit+0xac0/0xb40
> [ce221eb8] [c00f5be8] find_kallsyms_symbol_value+0x0/0x128
> [ce221ed8] [c05ed2d0] crypto_alg_put+0x0/0x70
> [ce221ef8] [c007cd74] kthread+0x134/0x170
> [ce221f38] [c001433c] ret_from_kernel_thread+0x14/0x1c
> 
> Bisect log is attached. The patch can not easily be reverted since
> it results in compile errors.
> 
> Note that similar failures are seen with sparc32 images. Those bisect
> to a different patch, but reverting that patch doesn't fix the problem.
> The failure pattern (warnings followed by a crash in cryptomgr_test)
> is the same.
> 
> Guenter
> 
> ---
> # bad: [bdecf38f228bcca73b31ada98b5b7ba1215eb9c9] Add linux-next specific files for 20200515
> # good: [2ef96a5bb12be62ef75b5828c0aab838ebb29cb8] Linux 5.7-rc5
> git bisect start 'HEAD' 'v5.7-rc5'
> # good: [3674d7aa7a8e61d993886c2fb7c896c5ef85e988] Merge remote-tracking branch 'crypto/master'
> git bisect good 3674d7aa7a8e61d993886c2fb7c896c5ef85e988
> # good: [87f6f21783522e6d62127cf33ae5e95f50874beb] Merge remote-tracking branch 'spi/for-next'
> git bisect good 87f6f21783522e6d62127cf33ae5e95f50874beb
> # good: [5c428e8277d5d97c85126387d4e00aa5adde4400] Merge remote-tracking branch 'staging/staging-next'
> git bisect good 5c428e8277d5d97c85126387d4e00aa5adde4400
> # good: [f68de67ed934e7bdef4799fd7777c86f33f14982] Merge remote-tracking branch 'hyperv/hyperv-next'
> git bisect good f68de67ed934e7bdef4799fd7777c86f33f14982
> # bad: [54acd2dc52b069da59639eea0d0c92726f32fb01] mm/memblock: fix a typo in comment "implict"->"implicit"
> git bisect bad 54acd2dc52b069da59639eea0d0c92726f32fb01
> # good: [784a17aa58a529b84f7cc50f351ed4acf3bd11f3] mm: remove the pgprot argument to __vmalloc
> git bisect good 784a17aa58a529b84f7cc50f351ed4acf3bd11f3
> # good: [6cd8137ff37e9a37aee2d2a8889c8beb8eab192f] khugepaged: replace the usage of system(3) in the test
> git bisect good 6cd8137ff37e9a37aee2d2a8889c8beb8eab192f
> # bad: [6987da379826ed01b8a1cf046b67cc8cc10117cc] sparc: remove unnecessary includes
> git bisect bad 6987da379826ed01b8a1cf046b67cc8cc10117cc
> # good: [bc17b545388f64c09e83e367898e28f60277c584] mm/hugetlb: define a generic fallback for is_hugepage_only_range()
> git bisect good bc17b545388f64c09e83e367898e28f60277c584
> # good: [9b5aa5b43f957f03a1f4a9aff5f7924e2ebbc011] arch-kmap_atomic-consolidate-duplicate-code-checkpatch-fixes
> git bisect good 9b5aa5b43f957f03a1f4a9aff5f7924e2ebbc011
> # bad: [89194ba5ee31567eeee9c81101b334c8e3248198] arch/kmap: define kmap_atomic_prot() for all arch's
> git bisect bad 89194ba5ee31567eeee9c81101b334c8e3248198
> # good: [022785d2bea99f8bc2a37b7b6c525eea26f6ac59] arch-kunmap_atomic-consolidate-duplicate-code-checkpatch-fixes
> git bisect good 022785d2bea99f8bc2a37b7b6c525eea26f6ac59
> # good: [a13c2f39e3f0519ddee57d26cc66ec70e3546106] arch/kmap: don't hard code kmap_prot values
> git bisect good a13c2f39e3f0519ddee57d26cc66ec70e3546106
> # first bad commit: [89194ba5ee31567eeee9c81101b334c8e3248198] arch/kmap: define kmap_atomic_prot() for all arch's
> 
> 

  reply index

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-07 14:59 [PATCH V3 00/15] Remove duplicated kmap code ira.weiny
2020-05-07 14:59 ` [PATCH V3 01/15] arch/kmap: Remove BUG_ON() ira.weiny
2020-05-07 14:59 ` [PATCH V3 02/15] arch/xtensa: Move kmap build bug out of the way ira.weiny
2020-05-07 14:59 ` [PATCH V3 03/15] arch/kmap: Remove redundant arch specific kmaps ira.weiny
2020-05-07 14:59 ` [PATCH V3 04/15] arch/kunmap: Remove duplicate kunmap implementations ira.weiny
2020-05-07 14:59 ` [PATCH V3 05/15] {x86,powerpc,microblaze}/kmap: Move preempt disable ira.weiny
2020-05-07 14:59 ` [PATCH V3 06/15] arch/kmap_atomic: Consolidate duplicate code ira.weiny
2020-05-07 14:59 ` [PATCH V3 07/15] arch/kunmap_atomic: " ira.weiny
2020-05-16 22:33   ` Guenter Roeck
2020-05-18  3:49     ` Ira Weiny
2020-05-18  4:29       ` Guenter Roeck
2020-05-18 18:11         ` Ira Weiny
2020-05-19  0:03         ` Ira Weiny
2020-05-19  2:50           ` Guenter Roeck
2020-05-19 16:29             ` Ira Weiny
2020-05-18 16:11       ` Guenter Roeck
2020-05-18 18:48   ` [PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable pagefault/preempt twice ira.weiny
2020-05-19 16:54     ` Guenter Roeck
2020-05-19 18:40       ` Ira Weiny
2020-05-19 19:42         ` Guenter Roeck
2020-05-20  5:02           ` Ira Weiny
2020-05-20  5:13           ` Ira Weiny
2020-05-21 16:05             ` Guenter Roeck
2020-05-21 17:42               ` Ira Weiny
2020-05-21 22:27                 ` Guenter Roeck
2020-05-21 22:36                   ` Weiny, Ira
2020-06-03 20:57                 ` Andrew Morton
2020-06-03 21:14                   ` Ira Weiny
2020-06-03 23:44                     ` Guenter Roeck
2020-06-04  6:18                       ` Mike Rapoport
2020-06-04  6:43                         ` Ira Weiny
2020-06-04  6:22                       ` Ira Weiny
2020-06-04  6:37                         ` Mike Rapoport
2020-06-04  6:44                           ` Ira Weiny
2020-06-04  9:38                         ` Guenter Roeck
2020-06-04  9:41                       ` Mike Rapoport
2020-06-04 20:51                         ` Ira Weiny
2020-05-21 15:14           ` Ira Weiny
2020-05-21 17:27       ` Al Viro
2020-05-21 22:20         ` Guenter Roeck
2020-05-21 22:46           ` Al Viro
2020-05-22  0:46             ` Al Viro
2020-05-22  1:11               ` Guenter Roeck
2020-05-22  1:29                 ` Al Viro
2020-05-22  1:35                   ` Al Viro
2020-05-22  2:28                     ` Guenter Roeck
2020-05-07 14:59 ` [PATCH V3 08/15] arch/kmap: Ensure kmap_prot visibility ira.weiny
2020-05-07 14:59 ` [PATCH V3 09/15] arch/kmap: Don't hard code kmap_prot values ira.weiny
2020-05-07 14:59 ` [PATCH V3 10/15] arch/kmap: Define kmap_atomic_prot() for all arch's ira.weiny
2020-05-17 17:37   ` Guenter Roeck
2020-05-18 18:17     ` Ira Weiny [this message]
2020-05-07 14:59 ` [PATCH V3 11/15] drm: Remove drm specific kmap_atomic code ira.weiny
2020-05-07 15:00 ` [PATCH V3 12/15] kmap: Remove kmap_atomic_to_page() ira.weiny
2020-05-07 15:00 ` [PATCH V3 13/15] parisc/kmap: Remove duplicate kmap code ira.weiny
2020-05-07 20:52   ` Andrew Morton
2020-05-07 22:50     ` Ira Weiny
2020-05-07 15:00 ` [PATCH V3 14/15] sparc: Remove unnecessary includes ira.weiny
2020-05-07 15:00 ` [PATCH V3 15/15] kmap: Consolidate kmap_prot definitions ira.weiny
2020-05-07 20:53   ` Andrew Morton
2020-05-07 22:51     ` Ira Weiny
2020-05-07 22:52   ` [PATCH V3.1] " ira.weiny

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200518181705.GD3025231@iweiny-DESK2.sc.intel.com \
    --to=ira.weiny@intel.com \
    --cc=James.Bottomley@HansenPartnership.com \
    --cc=akpm@linux-foundation.org \
    --cc=benh@kernel.crashing.org \
    --cc=bp@alien8.de \
    --cc=chris@zankel.net \
    --cc=christian.koenig@amd.com \
    --cc=dan.j.williams@intel.com \
    --cc=dave.hansen@linux.intel.com \
    --cc=davem@davemloft.net \
    --cc=deller@gmx.de \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=hch@lst.de \
    --cc=hpa@zytor.com \
    --cc=jcmvbkbc@gmail.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-csky@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mips@vger.kernel.org \
    --cc=linux-parisc@vger.kernel.org \
    --cc=linux-snps-arc@lists.infradead.org \
    --cc=linux-xtensa@linux-xtensa.org \
    --cc=linux@roeck-us.net \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=luto@kernel.org \
    --cc=mingo@redhat.com \
    --cc=paulus@samba.org \
    --cc=peterz@infradead.org \
    --cc=sparclinux@vger.kernel.org \
    --cc=tglx@linutronix.de \
    --cc=tsbogend@alpha.franken.de \
    --cc=viro@zeniv.linux.org.uk \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-parisc archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-parisc/0 linux-parisc/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-parisc linux-parisc/ https://lore.kernel.org/linux-parisc \
		linux-parisc@vger.kernel.org
	public-inbox-index linux-parisc

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-parisc


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git